Insulator-pin mounting.



No. 871,490. PATBNTED NOV. 19, 1907.

' J. D. E. DUNCAN.

INSULATOR PIN MOUNTING.

APPLICATION FILED Luml. 1901.

I IIIIIIIII i INVENTOR fil /355 a,. WMIQM I a 5 @L n1: NORRIS PETERS ca.Wilsnmardmoc'c,

JOHN D. E. DUNCAN, OF NEW YORK, N. Y.

INSULATOR-PIN MOUNTING.

Specification of Letters Patent.

Patented Nov. 19, 1907.

Application filed January 21, 1997. Serial No. 363,176.

To all whom it may concern:

Be it known that 1, JOHN D. E. DUNCAN, a citizen of the United States,and a resident of the borough of Brooklyn, county of Kings,

city and State of New York, have invented certain new and usefulImprovements in Insulator-PinlVlountings, of which the following is aspecification, taken in connection with the accompanying drawings.

This invention relates to insulator pin mountings, and relatesespecially to mounting heavy insulator pins such as are used with hightension power transmission insulators, so as to securely and rigidlyhold them in position.

- In the accompanying drawings showing illustrative embodiments of thisinvention, Figure 1 is a top view, Fig. 2 is a corresponding verticalsection, Fig. 3 is a vertical section of another form of the invention,Fig. 4 is the corres onding top view, Fig. 5 is a vertical detai sectionthrough the pin, and Fig. 6 shows the general arrangement of suchmountings, on a skeleton tower.

In the illustrative embodiment of this invention shown in Figs. 1 and 2,1, is the insulator pin which may be of the tubular metallicconstruction indicated, the insulator being mounted at the top of thepin in a well known manner. The cross arm 7 may be of wood, if desired,and is preferably formed with a suitable recess to accommodate theflange 9 of the support 8. This support may also be provided with thetransverse ribs 24, which may be seated in suitable cooperatingdepressions in the arm in the form of sawcuts or the like, and the ribs24 may diverge downwardly so as to prevent the support moving upwardsafter the'ribs are seated in the arm. The support is preferably providedwith a plurality of saddles 10, 11, which may be conveniently stamped upfrom the rest of the support if it is made of sheet steel or similarresilient material or may be readily formed by casting or in other ways.These saddles are as indicated, curved to form a seat for the pin, thecurvature oflthe saddle being preferably of slightly less radius thanthe outside of the pin so as to be first engaged by it at two separatedpoints and thereafter the pin may be firmly seated by the slightyielding of this resilient saddle, which thus has a slight grippingengagement with the pin. The lower saddle 1 1 may be provided with aconnected bracket 13, to support the bottom of the pin and with a lug12, to engage a suitable socket22, in the pin, which may be formed asindicated in Fig. 5.

The support 8, and saddles are first placed in position on the cross arm7, and the pin 1 arranged in proper position in cooperation therewith.Then the attaching means which may be in the form of the encirclingU-bolts 2, 3, are inserted in suitable holes in the saddles and arm andthe nuts 4 set home to clamp the parts in position, preferably inconnection with suitable vertical straps 6. These U-bolts do not requireany aperture in the pin itself or weaken its strength in any way, and inpractice may be adjusted so as to cause the resilient saddles'to conformproperly with the contour of the pin and also to force these saddles andother parts of the mounting into engagement with the arm sulliciently sothat the pin is held with a spring action causcdby the elasticity of thevarious parts.

The other figures of the drawings indicate a modification in which theinsulator pin is shown applied to asteel tower comprising the pillars20, secured by the stays 22, 23, having suitable skeleton arms 14, 14and 15, 15, which may be held in proper position by the lattice bracing21 indicated. A plurality of resilient saddles 17, 18 are preferablysecured to the skeleton arm and may be formed with curved grippingresilient seats of a curvature slightly greater than that of the outsideof the insulator pin 1, so as to be depressed at the central point offirst engagement and thereafter conform properly to the pin when theparts are clamped together by the nuts 4, 5 on the U-bolts 2, 3,encircling the pin, which are preferably so adjusted as to support thepin with a spring action due to the elasticity of the arts.

If desired, the sad les may be provided with the flanges 16, 19, toengage the arm and maintain alinement therewith, and the flanges may fitbetween the bracing 21 to prevent horizontal movement on the arm, andwith a suitable lug 12, to engage a corresponding socket 22 in the pin 1to hold it firmly in proper vertical alinement as is indicated in Fig.5.

Having thus described this invention in 1 connection with the severalillustrative embodiments thereof, to the details of which it as new andwhat is desired to be secured by Letters Patent is set forth in theappended claims.

1. In insulator pin mountings, a metallic insulator pin provided with asocket, a support provided with a flange and transverse ribs to engagean arm, and having a lug to engage said socket, and having a bracket anda. plurality of resilient gripping saddles to conform to said pin, aplurality of U-bolts encircling said pin adjacent said saddles andstraps cooperating with said bolts to elastically engage the oppositeside of said arm.

2. In insulator pin mountings, an insulator pin provided with a socket,a support having portions to engage an arm a lug to engage said socketanda plurality of resilient gripping saddles to engage said pin andU-bolts encircling said pin to hold the same and said saddles upon saidarm. g

3. In insulator pin mountings, a plurality of saddles curved to conformto an insulator pin and provided with means to engage an arm, and with alug to engage said pin and hold it in longitudinal alinement, andU-bolts to hold said pin and saddles upon said arm.

4. An insulator pin support formed of sheet metal having upon its faceone or more saddles, a flange at its upper portion to cooperate with thecross arm, and a bracket at the lower end of the support to form a seatfor the insulator pin.

5. In insulator pin mountings, a support provided on its face with aplurality of integral saddles and with means to cooperate with meanscarried by the pin to mamtain' longitudinal alinement of the insulatorpin, said support being also provided with means to cooperate with thecross arm to insure alinement therewith.

6. In insulator pin mountings, a stamped resilient support provided witha plurality of saddles to engage insulator pins, and provided with meansto positively interlock with and maintain said pins in longitudinalalinement and provided with portions to engage an arm and maintainalinement therewith. I

7. In insulator pin mountings, a metallic insulator pin support having asaddle to engage a pin and projecting means to positively hold said pinin longitudinal alinement.

8. In insulator pin mountings, a support rovided with a saddle to engagean insuator pin and provided with means to-engage and positively holdsaidpin in longitudinal alinement, said support having means to engagethe cross arm and maintain alinement therewith.

JOHN D. E. DUNCAN. Witnesses:

HARRY L. DUNCAN, JEssrE B. KAY.

